a x a = 323761
tìm a
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a x 0,1 = a : \(\dfrac{1}{10}\)
a : 0,01 = a x \(\dfrac{1}{100}\)
a x 1000 = a : 0,001
a : 1000 = a x \(\dfrac{1}{1000}\)
\(x\) : 0,2 = \(x\) x \(\dfrac{1}{5}\)
\(x\) : 0,25 = \(x\) x \(\dfrac{1}{4}\)
\(x\) : 0,125 = \(x\) x \(\dfrac{1}{8}\)
\(x\) : 0,5 = \(x\) x \(\dfrac{1}{2}\)
\(\left(a+b\right)\times c=a\times c+b\times c\)
\(a\times\left(b+c\right)=a\times b+a\times c\)
\(a\times\left(b-c\right)=a\times b-a\times c\)
\(a\times b-a\times c=a\times\left(b-c\right)\)
( a+b)xc------axc+bxc
a x ( b + c)----- a x b + a x c
a x ( b-c )------ a x b - a x c
a x b-a x c-------a x ( b - c )
\(A=\left(1+\dfrac{a+\sqrt{a}}{\sqrt{a}+1}\right)\left(1+\dfrac{a-\sqrt{a}}{1-\sqrt{a}}\right)\left(a>0;a\ne1\right)\\ A=\left(1+\dfrac{\sqrt{a}\left(\sqrt{a}+1\right)}{\sqrt{a}+1}\right)\left(1-\dfrac{\sqrt{a}\left(\sqrt{a}-1\right)}{\sqrt{a}-1}\right)\\ A=\left(1+\sqrt{a}\right)\left(1-\sqrt{a}\right)=1-a\\ B=\dfrac{x+\sqrt{x}}{\sqrt{x}}+\dfrac{x-y}{\sqrt{x}+2}\left(x>0\right)\\ B=\dfrac{\sqrt{x}\left(\sqrt{x}+1\right)}{\sqrt{x}}+\dfrac{x-y}{\sqrt{x}+2}=\sqrt{x}+1+\dfrac{x-y}{\sqrt{x}+2}\\ B=\dfrac{x+3\sqrt{x}+2+x-y}{\sqrt{x}+2}=\dfrac{2x+3\sqrt{x}+2-y}{\sqrt{x}+2}\)
a x a = 323761
=> a = 569
= 569 x 569 = 323761
nhớ k cho mình nhé!